GCE Mathematics Written Mark Scheme January 2006 - Gosford Hill ...

MPC4 – AQA GCE Mark Scheme, 2006 January seriesKey To Mark Scheme And Abbreviations Used In MarkingMm or dMABEmark is for methodmark is dependent on one or more M marks and is for methodmark is dependent on M or m marks and is for accuracymark is independent of M or m marks and is for method and accuracymark is for explanationor ft or F follow through from previousincorrect result MC mis-copyCAO correct answer only MR mis-readCSO correct solution only RA required accuracyAWFW anything which falls within FW further workAWRT anything which rounds to ISW ignore subsequent workACF any correct form FIW from incorrect workAG answer given BOD given benefit of doubtSC special case WR work replaced by candidateOE or equivalent FB formulae bookA2,1 2 or 1 (or 0) accuracy marks NOS not on scheme–x EE deduct x marks for each error G graphNMS no method shown c candidatePI possibly implied sf significant figure(s)SCA substantially correct approach dp decimal place(s)No Method ShownWhere the question specifically requires a particular method to be used, we must usually see evidence ofuse of this method for any marks to be awarded. However, there are situations in some units where partmarks would be appropriate, particularly when similar techniques are involved. Your Principal Examinerwill alert you to these and details will be provided on the mark scheme.Where the answer can be reasonably obtained without showing working and it is very unlikely that thecorrect answer can be obtained by using an incorrect method, we must award full marks. However, theobvious penalty to candidates showing no working is that incorrect answers, however close, earn nomarks.Where a question asks the candidate to state or write down a result, no method need be shown for fullmarks.Where the permitted calculator has functions which reasonably allow the solution of the question directly,the correct answer without working earns full marks, unless it is given to less than the degree of accuracyaccepted in the mark scheme, when it gains no marks.Otherwise we require evidence of a correct method for any marks to be awarded.2